2022秋新教材高中英语Unit3ConservationPeriod1TopicTalk课件北师大版选择性必修第一册

这是一份2022秋新教材高中英语Unit3ConservationPeriod1TopicTalk课件北师大版选择性必修第一册，共60页。

UNIT 3　CONSERVATIONPeriod One　Topic Talk课前自主预习¤重点单词1．________________n．保护2．________________adj.塑料制的3．________________vt.破坏；毁掉4．________________n．采矿业5．________________n．一项，一条6．________________vi.& vt.再利用，回收利用7．________________adj.不可回收的conservationplasticdestroyminingitemrecycleunrecyclable　8．________________adj.有教育意义的；知识性强的9．________________n．威胁；(灾难等坏事)发生的可能10．________________v．转换，改变11．________________adv.非法地，违法地12．________________vi.& vt.猎取，猎杀13．________________adj.灭绝的，绝种的14．________________adv.非常地，极端地15．________________adj.紧急的，急迫的informativethreatswitchillegallyhuntextinctincrediblyurgent　¤重点词块1．正如你所知道的那样________________2．为了，以便________________3．转变，转换________________4．尽快地___________________5．……的数量________________6．减少________________as you know　in order to　switch to　as soon as possible　the amount of…　cut down　7．在……中扮演角色/起某种作用________________8．尽自己的职责________________9．对……有害处________________play a role/part in　do one’s part　be bad for…　¤重点句式1．(P108)It was by Professor Linda Wei, the environmental expert, ________ ________？那是环境专家琳达·魏教授做的，不是吗？【答案】wasn’t it2．(P109)… there will be no rhinos ________ in the world in 20 years.……20年后，世界上将没有犀牛。【答案】left课堂新知讲练1．threat n．威胁；(灾难等坏事)发生的可能Paraphrase: a situation or activity that could cause harm or danger (P108) After the lecture, I can see that the use of oil and coal is one of the biggest threats to our planet. 【翻译】讲座结束后，我明白了石油和煤炭的使用是对我们星球最大的威胁之一。◇词汇拓讲【语言提升】make threats against sb.对某人进行威胁under threat受到威胁She is prepared to carry out her threat to resign.她准备好辞职。He received death threats from someone unknown.他收到了来自不明人士的死亡恐吓。There is a real threat of war.确有可能发生战争。 These ancient woodlands are under threat from new road developments. 新道路开发可能对这些古老的林地造成破坏。He is unlikely to be a threat to the Spanish player in the final. 他不可能会在决赛中对这位西班牙运动员形成威胁。 Drugs pose a major threat to our society.毒品成为对社会的一大威胁。threaten vt.威胁到；危及；威胁，恐吓The incident threatens to ruin his chance in the election.这件事威胁到他当选的机会。He threatened to take them to court.他扬言要把他们告上法庭。He was threatened with dismissal if he continued to turn up late for work.他受到警告，如果继续上班迟到，就会被解雇。The man became angry and threatened that he would call the police.那个男人生气了，威胁说要去报警。【词汇拓展】threatening adj.恐吓的，威胁的threatened adj.受到威胁的【温馨提示】-en作后缀可用于构成动词，常表示“使，使成为，变得”等含义。常见的此类动词还有：shorten 使缩短；deepen加深，使变深；broaden使变宽，加宽；sharpen使锋利，削尖；strengthen加强；frighten使害怕。【针对练习】单句语法填空(1)Wildlife has been greatly ________(threat) in the modern age.(2)Our neighbor threatened ________(call) the police if we didn’t stop the noise.【答案】(1)threatened　(2)to call　(3)Some cultures see direct eye contact as impolite or ________(threaten) behavior, while Americans see it as a sign of genuineness and honesty.(4)To avoid knee pain, you can run on soft surfaces, do exercise to ________(strength) your leg muscles, avoid hills and get good running shoes.【答案】(3)threatening　(4)strengthen2．switch vi.&vt. 转换，改变Paraphrase: to change from one thing to another, or make sth./do this(P108－109) We definitely need to switch to different forms of power as soon as possible. 【翻译】我们确实需要尽快转向到(其他)不同形式的能源。【语言提升】switch to切换到，变成To keep fit, you can switch to morning or lunchtime exercise. 为了保持健康，你可以转变到早上或午间锻炼。Please switch to the news channel. I’d like to watch the news program. 请转换到新闻频道。我想看看新闻节目。switch on＝turn on打开(电器)What happens when you switch on a computer?当你开启电脑时，它发生了什么？switch off关闭(电器)；不再想着；不再注意；失去兴趣When I hear the word “football” I switch off.我听见“足球”两个字就腻味。Have you ever forgotten to switch off the TV or computer?你忘记过关闭电视或电脑吗？Remember to switch off the electricity before you start to repair the washing machine.修理洗衣机之前务必记得切断电源。switch over 换台，换频道I don’t want to watch this program. Please switch over.我不想看这个节目。请换一个台。switch (from A) to B　(由A)转变成BNow she has switched from a student into a housewife. 现在，她由一个学生变成了一个家庭主妇。【语境助记】Lucy got home from work early. After changing clothes, she switched off the light and came to the living room. Then she switched on the TV and switched it over to Channel 10.露西早早下班回到家，换完衣服后，她关灯来到客厅。然后她打开电视，转到第10频道。【针对练习】用switch相关短语的正确形式填空(1)Please ________ the radio to listen to news and the weather forecast.(2)Be sure to ________ the light when you leave the office.【答案】(1)switch on　(2)switch off　(3)We’d better take the train into the city center, then a bus, ________ the tram(有轨电车), then maybe a taxi.(4)This play is too boring. Will you please ________ to CCTV 5 to watch the live football match?【答案】(3)switching to　(4)switch over3．cut down削减，砍倒(P109)I think we should cut down the use of unrecyclable plastic to protect our planet.【翻译】我认为我们应该减少使用不可回收塑料来保护我们的地球。【语言提升】(1)cut down砍倒(及物动词)Deserts are also formed because people cut down trees and dig up grass.人们伐树掘草也会造成土壤沙化。(2)cut down还可以表示“减少”，其后面也可以直接宾语。cut…down (to…) 减少……(至……)cut down on…减少(在某个方面的开支)My uncle hasn’t been able to quit smoking, but at least he has cut down.我叔叔还未能戒烟，但至少他已经少抽了。We need to cut the article down to 1,000 words.我们得把这篇文章压缩到1 000词。Cut down on fatty foods if you want to lose weight.你如果想减肥，就得少吃高脂食物。cut构成的其他短语：cut up切碎　cut off砍下cut in插话；插入　cut out切掉；删去；关掉【针对练习】用cut的相关短语填空(1)Experts think the amount of homework for the students should be ________.(2)The water supply has been ________ temporarily because the workers are repairing one of the main pipes.(3)It is impolite to ________ when other people are talking.(4)I have been advised to ________ the poem from my article.【答案】(1)cut down　(2)cut off　(3)cut in　(4)cut out◇句式解读1．(P108) It was by Professor Linda Wei, the environmental expert, wasn’t it?【翻译】那是环境专家琳达·魏教授写的，不是吗？【句式解读】本句是一个反意疑问句，由陈述部分“It was by Professor Linda Wei, the environmental expert”和反意疑问部分“wasn’t it”构成。【句式提升】反意疑问句由陈述部分和反意疑问部分组成。其中反意疑问部分用于表示反问、疑问或强调等。反意疑问句的基本用法如下：(1)反意疑问句的构成：“肯定的陈述部分＋否定的反意疑问部分”或“否定的陈述部分＋肯定的反意疑问部分”。(2)反意疑问部分的主语：一般用与前面陈述部分的主语一致的人称代词(3)回答：对“否定的陈述部分＋肯定的反意疑问部分”的肯定回答仍然用yes，否定回答用no，但是yes译为“不”，no译为“是的”。 —He hasn’t finished his homework, has he?他还没有完成作业，是吗？—Yes, he has./No, he hasn’t.不，他完成了。/是的，他还没有完成。【归纳拓展】反意疑问句的其他常见情况：(1)当陈述部分的主语是everybody, everyone, someone, nobody, somebody等时，反意疑问部分的主语通常用they。Everyone knows the answer, don’t they? 大家都知道答案，不是吗？(2)陈述部分为含有定语从句或主语从句的主从复合句时，反意疑问部分的主语和谓语一般同主句的主语和谓语保持一致。He is not the man who gave us a report, is he? 他不是给我们做报告的那个人，是吗？(3)当陈述部分为there be结构时，反意疑问部分仍由there和be来构成。There’s no water, is there? 没有水了，是吗？(4)当陈述部分中有seldom, hardly, never, few, nothing, little等表示否定意义的词时，反意疑问部分用肯定形式。You have nothing against it, have you?你没有什么反对的，对吗？(5)当陈述部分是 “I/we＋think/believe/suppose/expect…＋宾语从句”时，反意疑问部分的主语和谓语往往与从句的主语和谓语保持一致，但要注意否定转移。I don’t think he is a suitable man for the job, is he?我认为他不是做那项工作的合适人选，不是吗？(6)“祈使句＋反意疑问部分”型反意疑问句中，反意疑问部分一般用“will you”。Have a little more coffee, will you?再来点咖啡，好吗？Don’t close the door, will you? 别关门，好吗？(7)以Let’s开头的祈使句对应的简略问句用shall we；以let us开头的陈述句对应的简略问句用will you。Let’s meet at the school gate, shall we?我们校门口见，好吗？Let us wait in the reading room, will you?我们在阅览室等，好吗？【针对练习】用反意疑问句补全句子(1)There is little doubt in your mind that he is innocent(无辜的)，______________？(2)He hardly gets up late, ______________？(3)Everyone is here, __________？【答案】(1)is there　(2)does he　(3)aren’t they(4)Let us do it now, ______________？(5)—Mike seldom has breakfast at home, ________？—No, but he did this morning.(6)I don’t think Michael has finished the report, __________？【答案】 (4)will you　(5)does he　(6)has he2．(P109)…there will be no rhinos left in the world in 20 years.【翻译】二十年后，世界上将没有犀牛剩下了。【句式解读】本句中的left是leave的过去分词，意为“剩下”。它修饰前面的名词rhinos。【句式提升】(1)过去分词作定语分为前置和后置两种情况：①前置定语：单个的过去分词作定语，通常放在被修饰词之前，但有些单个的过去分词习惯上放在所修饰词语的后面，如left。②后置定语：过去分词短语作定语时，通常放在被修饰词之后，它的作用相当于一个定语从句。This is one of our required subjects. 这是我们的必修课之一。There is little time left. Let’s hurry up.剩余时间不多了，我们快点吧。It is one of the funniest things found on the Internet so far this year.＝It is one of the funniest things have been found on the Internet so far this year.这是今年到目前为止在因特网上所发现的最有趣的事情之一。(2)过去分词作定语常用来修饰名词或代词，其逻辑主语就是它所修饰的名词或代词。过去分词表示被动、完成(不及物动词的过去分词只表示完成)。This is a used stamp. 这是一张用过的邮票。(表示被动和完成)They are cleaning the fallen leaves in the yard. 他们正在打扫院子里的落叶。(只表示完成)【针对练习】单句语法填空(1)A survey __________(make)at the end of last month suggests that 80% of the students in our school will study science in the future.(2)Jim has retired, but he still remembers the happy time __________(spend)with his students.(3)The producer comes regularly to collect cameras __________(return)to our shop for quality problems.【答案】(1)made　(2)spent　(3)returned翻译句子(4)我上周从图书馆借了一本马克·吐温写的书。【答案】I borrowed a book (which/that was) written by Mark Twain from the library last week.随堂知能小练Ⅰ.单词拼写1．Now __________ (塑料的) containers are strictly banned in our country.2．The old bridge was totally __________ (毀掉) in the heavy rain last week.3．A lot of things, such as iron, glass and paper, can be __________ (回收)．【答案】1.plastic　2.destroyed　3.recycled　4．There is a __________ (威胁) that the temperature will drop sharply in the coming few days.5．Wildlife is not allowed to be __________ (猎杀) in this mountainous area. 6．Many wild animals have been ________(灭绝的) for various reasons.【答案】4.threat　5.hunted　6.extinct　7．Mr Brown told the students a very ________(有教育意义的) story.8．Please turn on the TV set and ________(转换成) over to CCTV 7.9．If you have something ________(紧急的) to tell me, please make a phone call to me.10．Now if you act ________(非法地) on the high speed train, you will be fined.【答案】7.informative　8.switch　9．urgent　10.illegallyⅡ.单句语法填空1．We must try our best to keep our environment under careful ________(conserve)．2．Many people are afraid that humans are on the way to ________(destroy)．3．Things are now getting ________(incredible) troublesome.【答案】1.conservation　2.destruction　3.incredibly4．His story is really so________(inform) that you can really benefit from it.5．Would you like to attend the lecture ________ Professor Wang the day after tomorrow?6．________ you know, China will be more and more powerful in the future.【答案】4．informative　5.by　6.As　7．You’d better come back as soon ________ possible because your mother is ill. 8．The amount of pollution ________(be) getting down in our city now.9．Lily has to stay up late into the night ________(finish) her homework.10．Each of us has a role ________(play) in protecting the environment.【答案】7.as　8.is　9.to finish　10．to playⅢ.完成句子1．________________， our city is getting more and more beautiful.正如你所看到的，我们的城市变得越来越美丽。【答案】As you can see2．________________ and I will write something on it.请打开电脑，我要在上面写点东西。【答案】Please switch on the computer3．________________ on smoking because he is out of work now.因为他现在失业了，他必须减少吸烟的费用。【答案】He has to cut down his cost4．Women ____________________ in our country.妇女在我们国家起着重要的作用。【答案】play an important role/part5．You ought to finish your work _____________________.你应该尽快完成你的工作。【答案】as soon as possible